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Sweep 06 Nov 2026 · 01:32Z Build v2.1.319 537 read Stable v2.1.311 Latest v2.1.318 Next v2.1.319 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.271 ·

New model-pattern-gated nudge encouraging judicious subagent delegation ('lucky_cerf')

New guidance nudges Claude to weigh the real cost before spawning a subagent

Nothing to try yet In Development
JSON All of v2.1.271
Nothing to try yetTier: how much it should matter to you
2Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
SubagentsArea: what it touches
In DevelopmentKind: in v2.1.271,
In DevelopmentSection of the release

Unclear Nothing has been read yet about how the tengu_lucky_cerf or tengu_lucky_cerf_text gates are currently set for this site's account, so no statement is made about whether this guidance is active.

What

A new gate can enable, per model, a block of guidance text shown or injected to Claude about when it's worth delegating work to a subagent versus handling it directly. The text includes lines like "A fresh agent costs more than it looks," discussing the tradeoffs of spawning agents.

Why

This is meant to make Claude more judicious about creating subagents, weighing their overhead against just doing the work inline, which could reduce unnecessary agent spawning when it isn't worth the cost.

Read from
Feature flag
tengu_lucky_cerf Not enough to say

Nothing here resolved what this flag was doing on this version, so nothing here should be read as on or off.

This account: no value returned · anonymous baseline: no value returned · compiled default in v2.1.271: not a boolean we can read

These values were read against a different version of Claude Code, so treat them as the nearest reading available instead of one taken on this release.

tengu_lucky_cerf_text Not enough to say

Nothing here resolved what this flag was doing on this version, so nothing here should be read as on or off.

This account: no value returned · anonymous baseline: no value returned · compiled default in v2.1.271: not a boolean we can read

These values were read against a different version of Claude Code, so treat them as the nearest reading available instead of one taken on this release.

Read once, for one account on one subscription tier, against v2.1.271. It isn't a statement about your account. What a flag value here can and cannot tell you

What has happened since
Flag reading moved The flag server now returns nothing at all, having stopped carrying it for tengu_lucky_cerf, read as this account. A reading is one sample. Claude Code evaluates its flags remotely, so no client sees the targeting rule behind a value and this says nothing about your account.
Flag reading moved The flag server now returns nothing at all, having stopped carrying it for tengu_lucky_cerf_text, read as this account. A reading is one sample. Claude Code evaluates its flags remotely, so no client sees the targeting rule behind a value and this says nothing about your account.
Flag reading moved The flag server now returns "" for tengu_lucky_cerf_text, read as this account. A reading is one sample. Claude Code evaluates its flags remotely, so no client sees the targeting rule behind a value and this says nothing about your account.
Flag reading moved The flag server now returns nothing at all, having stopped carrying it for tengu_lucky_cerf_text, read as this account. A reading is one sample. Claude Code evaluates its flags remotely, so no client sees the targeting rule behind a value and this says nothing about your account.
Flag reading moved The flag server now returns "" for tengu_lucky_cerf_text, read as this account. A reading is one sample. Claude Code evaluates its flags remotely, so no client sees the targeting rule behind a value and this says nothing about your account.
Flag reading moved The flag server now returns nothing at all, having stopped carrying it for tengu_lucky_cerf_text, read as this account. A reading is one sample. Claude Code evaluates its flags remotely, so no client sees the targeting rule behind a value and this says nothing about your account.
Flag reading moved The flag server now returns "" for tengu_lucky_cerf_text, read as this account. A reading is one sample. Claude Code evaluates its flags remotely, so no client sees the targeting rule behind a value and this says nothing about your account.
Flag reading moved The flag server now returns nothing at all, having stopped carrying it for tengu_lucky_cerf_text, read as this account. A reading is one sample. Claude Code evaluates its flags remotely, so no client sees the targeting rule behind a value and this says nothing about your account.

See this across every release →

How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtNothing has been read yet about how the tengu_lucky_cerf or tengu_lucky_cerf_text gates are currently set for this site's account, so no…
The name it cites is new in this buildNew in this build: tengu_lucky_cerf

See this entry in the whole of v2.1.271 →

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